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https://issues.apache.org/jira/browse/LUCENE-7365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15357152#comment-15357152
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Adrien Grand commented on LUCENE-7365:
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I think you forgot to put LinearScoringIndexSearcher in the previous patch?
I am fine with the wrapper approach too, but if we do it I think we should wrap
at the weight level directly rather than at the query level. This way we can
still modify the way the query is executed, but without modifying the query
tree.
> Don't use BooleanScorer for small segments
> ------------------------------------------
>
> Key: LUCENE-7365
> URL: https://issues.apache.org/jira/browse/LUCENE-7365
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Attachments: LUCENE-7365-query.patch, LUCENE-7365.patch,
> LUCENE-7365.patch
>
>
> If a BooleanQuery meets certain criteria (only contains disjunctions, is
> likely to match large numbers of docs) then we use a BooleanScorer to score
> groups of 1024 docs at a time. This allocates arrays of 1024 Bucket objects
> up-front. On very small segments (for example, a MemoryIndex) this is very
> wasteful of memory, particularly if the query is large or deeply-nested. We
> should avoid using a bulk scorer on these segments.
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